Erweiterte Ansicht für Custom Post Types

global $wp_query;
if(isset($wp_query->query_vars['mypage'])) {
            
            if( "slug1" == $wp_query->query_vars['mypage'] ){


            }
            if( "slug2" == $wp_query->query_vars['mypage'] ){


            }
        }
        else
        {
   
        }

add_filter('rewrite_rules_array', 'myvars');
add_filter('query_vars', 'add_query_vars');


function myvars($rules) {
$newrules = array();
$newrules['posttypename1/([^/]+)/slug1/?$'] = 'index.php?posttypename1=$matches[1]&mypage=slug1';
$newrules['posttypename2/([^/]+)/slug2/?$'] = 'index.php?posttypename2=$matches[1]&mypage=slug2';
return $newrules + $rules;
}
function add_query_vars($myvars) {
$myvars[] = "mypage";
return $myvars;
}